tests: Switch one of the Travis jobs to an unsigned char environment (-funsigned-char)
tests: Switch one of the Travis jobs to an unsigned char environment (-funsigned-char)

pataquets/namecoin-core,kallewoof/bitcoin,wellenreiter01/Feathercoin,dscotese/bitcoin,yenliangl/bitcoin,bitcoinsSG/bitcoin,midnightmagic/bitcoin,apoelstra/bitcoin,pstratem/bitcoin,dscotese/bitcoin,ajtowns/bitcoin,jonasschnelli/bitcoin,rnicoll/bitcoin,andreaskern/bitcoin,pataquets/namecoin-core,monacoinproject/monacoin,AkioNak/bitcoin,sipsorcery/bitcoin,domob1812/namecore,alecalve/bitcoin,domob1812/namecore,MarcoFalke/bitcoin,GroestlCoin/bitcoin,kallewoof/bitcoin,jonasschnelli/bitcoin,ajtowns/bitcoin,instagibbs/bitcoin,dscotese/bitcoin,CryptArc/bitcoin,tjps/bitcoin,jnewbery/bitcoin,MeshCollider/bitcoin,andreaskern/bitcoin,qtumproject/qtum,midnightmagic/bitcoin,prusnak/bitcoin,alecalve/bitcoin,GroestlCoin/bitcoin,jambolo/bitcoin,domob1812/namecore,jonasschnelli/bitcoin,nikkitan/bitcoin,cdecker/bitcoin,gjhiggins/vcoincore,ajtowns/bitcoin,gjhiggins/vcoincore,GroestlCoin/GroestlCoin,rnicoll/bitcoin,midnightmagic/bitcoin,bitcoinknots/bitcoin,anditto/bitcoin,domob1812/bitcoin,bitcoinknots/bitcoin,jambolo/bitcoin,jlopp/statoshi,sipsorcery/bitcoin,qtumproject/qtum,sipsorcery/bitcoin,AkioNak/bitcoin,MeshCollider/bitcoin,gjhiggins/vcoincore,cdecker/bitcoin,jamesob/bitcoin,sstone/bitcoin,Xekyo/bitcoin,n1bor/bitcoin,jamesob/bitcoin,pataquets/namecoin-core,bitcoinknots/bitcoin,practicalswift/bitcoin,kallewoof/bitcoin,mruddy/bitcoin,pstratem/bitcoin,vertcoin/vertcoin,wellenreiter01/Feathercoin,pataquets/namecoin-core,cdecker/bitcoin,fanquake/bitcoin,jonasschnelli/bitcoin,domob1812/bitcoin,practicalswift/bitcoin,domob1812/namecore,apoelstra/bitcoin,MarcoFalke/bitcoin,lateminer/bitcoin,lateminer/bitcoin,midnightmagic/bitcoin,qtumproject/qtum,ahmedbodi/vertcoin,rnicoll/dogecoin,MarcoFalke/bitcoin,mm-s/bitcoin,mruddy/bitcoin,fanquake/bitcoin,vertcoin/vertcoin,Xekyo/bitcoin,tecnovert/particl-core,apoelstra/bitcoin,mitchellcash/bitcoin,domob1812/bitcoin,MarcoFalke/bitcoin,ajtowns/bitcoin,FeatherCoin/Feathercoin,instagibbs/bitcoin,EthanHeilman/bitcoin,bitcoin/bitcoin,DigitalPandacoin/pandacoin,andreaskern/bitcoin,GroestlCoin/GroestlCoin,litecoin-project/litecoin,practicalswift/bitcoin,particl/particl-core,GroestlCoin/bitcoin,jtimon/bitcoin,GroestlCoin/GroestlCoin,cdecker/bitcoin,fanquake/bitcoin,namecoin/namecore,particl/particl-core,jlopp/statoshi,tjps/bitcoin,n1bor/bitcoin,practicalswift/bitcoin,jamesob/bitcoin,GroestlCoin/bitcoin,rnicoll/dogecoin,prusnak/bitcoin,Xekyo/bitcoin,pataquets/namecoin-core,sstone/bitcoin,instagibbs/bitcoin,nikkitan/bitcoin,yenliangl/bitcoin,jlopp/statoshi,mm-s/bitcoin,fujicoin/fujicoin,vertcoin/vertcoin,instagibbs/bitcoin,nikkitan/bitcoin,bitcoin/bitcoin,JeremyRubin/bitcoin,jlopp/statoshi,JeremyRubin/bitcoin,pstratem/bitcoin,pstratem/bitcoin,tjps/bitcoin,anditto/bitcoin,peercoin/peercoin,achow101/bitcoin,mruddy/bitcoin,wellenreiter01/Feathercoin,sstone/bitcoin,litecoin-project/litecoin,andreaskern/bitcoin,EthanHeilman/bitcoin,qtumproject/qtum,fujicoin/fujicoin,fujicoin/fujicoin,ahmedbodi/vertcoin,vertcoin/vertcoin,ahmedbodi/vertcoin,apoelstra/bitcoin,instagibbs/bitcoin,prusnak/bitcoin,sstone/bitcoin,pstratem/bitcoin,jtimon/bitcoin,JeremyRubin/bitcoin,sstone/bitcoin,mm-s/bitcoin,AkioNak/bitcoin,DigitalPandacoin/pandacoin,ElementsProject/elements,alecalve/bitcoin,litecoin-project/litecoin,DigitalPandacoin/pandacoin,qtumproject/qtum,cdecker/bitcoin,mitchellcash/bitcoin,bitcoin/bitcoin,rnicoll/dogecoin,namecoin/namecoin-core,CryptArc/bitcoin,CryptArc/bitcoin,bitcoin/bitcoin,sipsorcery/bitcoin,mitchellcash/bitcoin,jtimon/bitcoin,domob1812/bitcoin,bitcoinsSG/bitcoin,mm-s/bitcoin,jambolo/bitcoin,mruddy/bitcoin,gjhiggins/vcoincore,yenliangl/bitcoin,AkioNak/bitcoin,n1bor/bitcoin,jtimon/bitcoin,n1bor/bitcoin,mitchellcash/bitcoin,particl/particl-core,prusnak/bitcoin,GroestlCoin/GroestlCoin,particl/particl-core,FeatherCoin/Feathercoin,qtumproject/qtum,FeatherCoin/Feathercoin,peercoin/peercoin,dscotese/bitcoin,bitcoinsSG/bitcoin,JeremyRubin/bitcoin,dscotese/bitcoin,EthanHeilman/bitcoin,vertcoin/vertcoin,apoelstra/bitcoin,mruddy/bitcoin,midnightmagic/bitcoin,jambolo/bitcoin,monacoinproject/monacoin,MeshCollider/bitcoin,bitcoin/bitcoin,fanquake/bitcoin,alecalve/bitcoin,namecoin/namecore,Xekyo/bitcoin,anditto/bitcoin,JeremyRubin/bitcoin,monacoinproject/monacoin,practicalswift/bitcoin,tecnovert/particl-core,bitcoinsSG/bitcoin,yenliangl/bitcoin,GroestlCoin/GroestlCoin,gjhiggins/vcoincore,monacoinproject/monacoin,sipsorcery/bitcoin,ElementsProject/elements,achow101/bitcoin,tecnovert/particl-core,n1bor/bitcoin,mm-s/bitcoin,rnicoll/bitcoin,CryptArc/bitcoin,tecnovert/particl-core,Sjors/bitcoin,ajtowns/bitcoin,kallewoof/bitcoin,midnightmagic/bitcoin,ahmedbodi/vertcoin,nikkitan/bitcoin,bitcoinsSG/bitcoin,prusnak/bitcoin,bitcoin/bitcoin,CryptArc/bitcoin,namecoin/namecoin-core,sipsorcery/bitcoin,alecalve/bitcoin,JeremyRubin/bitcoin,cdecker/bitcoin,tjps/bitcoin,achow101/bitcoin,DigitalPandacoin/pandacoin,pstratem/bitcoin,vertcoin/vertcoin,namecoin/namecoin-core,MeshCollider/bitcoin,lateminer/bitcoin,monacoinproject/monacoin,particl/particl-core,lateminer/bitcoin,tjps/bitcoin,ElementsProject/elements,FeatherCoin/Feathercoin,peercoin/peercoin,litecoin-project/litecoin,bitcoinsSG/bitcoin,jnewbery/bitcoin,MeshCollider/bitcoin,jlopp/statoshi,particl/particl-core,yenliangl/bitcoin,kallewoof/bitcoin,CryptArc/bitcoin,GroestlCoin/GroestlCoin,lateminer/bitcoin,n1bor/bitcoin,Xekyo/bitcoin,peercoin/peercoin,sstone/bitcoin,jnewbery/bitcoin,jamesob/bitcoin,namecoin/namecore,FeatherCoin/Feathercoin,tecnovert/particl-core,peercoin/peercoin,Sjors/bitcoin,kallewoof/bitcoin,ElementsProject/elements,Xekyo/bitcoin,jambolo/bitcoin,anditto/bitcoin,achow101/bitcoin,jamesob/bitcoin,rnicoll/dogecoin,andreaskern/bitcoin,mitchellcash/bitcoin,jambolo/bitcoin,jtimon/bitcoin,qtumproject/qtum,ElementsProject/elements,litecoin-project/litecoin,namecoin/namecoin-core,domob1812/namecore,fanquake/bitcoin,domob1812/bitcoin,andreaskern/bitcoin,EthanHeilman/bitcoin,Sjors/bitcoin,DigitalPandacoin/pandacoin,mm-s/bitcoin,bitcoinknots/bitcoin,nikkitan/bitcoin,achow101/bitcoin,fanquake/bitcoin,Sjors/bitcoin,anditto/bitcoin,FeatherCoin/Feathercoin,jtimon/bitcoin,AkioNak/bitcoin,anditto/bitcoin,rnicoll/bitcoin,nikkitan/bitcoin,bitcoinknots/bitcoin,domob1812/bitcoin,monacoinproject/monacoin,jnewbery/bitcoin,jlopp/statoshi,MarcoFalke/bitcoin,wellenreiter01/Feathercoin,dscotese/bitcoin,ElementsProject/elements,namecoin/namecoin-core,jamesob/bitcoin,achow101/bitcoin,namecoin/namecore,MarcoFalke/bitcoin,alecalve/bitcoin,litecoin-project/litecoin,wellenreiter01/Feathercoin,fujicoin/fujicoin,rnicoll/bitcoin,namecoin/namecore,mitchellcash/bitcoin,domob1812/namecore,fujicoin/fujicoin,ahmedbodi/vertcoin,MeshCollider/bitcoin,lateminer/bitcoin,namecoin/namecoin-core,mruddy/bitcoin,AkioNak/bitcoin,ahmedbodi/vertcoin,prusnak/bitcoin,tjps/bitcoin,peercoin/peercoin,wellenreiter01/Feathercoin,jnewbery/bitcoin,pataquets/namecoin-core,rnicoll/dogecoin,GroestlCoin/bitcoin,EthanHeilman/bitcoin,tecnovert/particl-core,Sjors/bitcoin,jonasschnelli/bitcoin,EthanHeilman/bitcoin,fujicoin/fujicoin,namecoin/namecore,ajtowns/bitcoin,practicalswift/bitcoin,apoelstra/bitcoin,GroestlCoin/bitcoin,instagibbs/bitcoin,gjhiggins/vcoincore,DigitalPandacoin/pandacoin,yenliangl/bitcoin,rnicoll/bitcoin